Avient Corporation
US ˙ NYSE ˙ US05368V1061

SecurityAVNT / Avient Corporation
InstitutionSei Investments Co
Latest Disclosed Ownership236,734 shares
Latest Disclosed Value $ 7,395,545
Sei Investments Co reports 15.02% increase in ownership of AVNT / Avient Corporation

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 236,734 shares of Avient Corporation (US:AVNT) valued at $7,395,570 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 205,811 shares of Avient Corporation. This represents a change in shares of 15.02% during the quarter. The current value of the position is $8,167,323 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-02-13 2025-12-31 13F AVIENT COM 05368V106 236,734 30,923 15.02 7,396 9.05 0.0073
2025-11-13 2025-09-30 13F AVIENT COM 05368V106 205,811 17,221 9.13 6,781 11.29 0.0073
2025-08-14 2025-06-30 13F AVIENT COM 05368V106 188,590 26,784 16.55 6,093 1.35 0.0071
2025-05-14 2025-03-31 13F/A-1 AVIENT COM 05368V106 161,806 -10,783 -6.25 6,013 -14.74 0.0077
2025-05-13 2025-03-31 13F AVIENT COM 05368V106 173,140 551 7,052 0.0077
2025-02-11 2024-12-31 13F AVIENT COM 05368V106 172,589 6,471 3.90 7,052 -15.64 0.0091
2024-11-12 2024-09-30 13F AVIENT COM 05368V106 166,118 10,355 6.65 8,359 22.93 0.0109
2024-08-13 2024-06-30 13F AVIENT COM 05368V106 155,763 44,026 39.40 6,799 40.21 0.0096
2024-05-07 2024-03-31 13F AVIENT COM 05368V106 111,737 -4,078 -3.52 4,849 0.73 0.0071
2024-02-14 2023-12-31 13F AVIENT COM 05368V106 115,815 -41,597 -26.43 4,814 -13.40 0.0077
2023-11-14 2023-09-30 13F AVIENT COM 05368V106 157,412 26,721 20.45 5,560 4.00 0.0100
2023-08-11 2023-06-30 13F AVIENT COM 05368V106 130,691 4,500 3.57 5,345 2.91 0.0093
2023-05-12 2023-03-31 13F AVIENT COM 05368V106 126,191 98,120 349.54 5,194 448.47 0.0096
2023-02-10 2022-12-31 13F AVIENT COM 05368V106 28,071 -71,214 -71.73 948 -68.52 0.0021
2022-11-14 2022-09-30 13F AVIENT COM 05368V106 99,285 -41,313 -29.38 3,008 -46.68 0.0067
2022-08-15 2022-06-30 13F AVIENT COM 05368V106 140,598 38,379 37.55 5,641 14.79 0.0122
2022-05-13 2022-03-31 13F AVIENT COM 05368V106 102,219 -7,514 -6.85 4,914 -19.95 0.0099
2022-02-14 2021-12-31 13F AVIENT COM 05368V106 109,733 -5,292 -4.60 6,139 14.98 0.0115
2021-11-12 2021-09-30 13F AVIENT COM 05368V106 115,025 -16,130 -12.30 5,339 -17.19 0.0112
2021-08-06 2021-06-30 13F AVIENT COM 05368V106 131,155 -24,184 -15.57 6,447 -10.76 0.0143
2021-05-12 2021-03-31 13F AVIENT COM 05368V106 155,339 -63,343 -28.97 7,224 -17.97 0.0182
2021-02-08 2020-12-31 13F AVIENT COM 05368V106 218,682 -57,701 -20.88 8,807 20.40 0.0228
2020-12-04 2020-09-30 13F/A-1 AVIENT COM 05368V106 276,383 -30,843 -10.04 7,315 -9.30 0.0212
2020-11-06 2020-09-30 13F AVIENT COM 05368V106 276,383 276,383 7,315
2020-08-17 2020-06-30 13F/A-1 POLYONE COM 73179P106 307,226 125,187 68.77 8,065 133.84 0.0250
2020-08-11 2020-06-30 13F POLYONE COM 73179P106 204,264 22,225 7,182 19,481.5573
2020-05-14 2020-03-31 13F POLYONE COM 73179P106 182,039 4,878 2.75 3,449 -47.13 0.0127
2020-02-06 2019-12-31 13F POLYONE COM 73179P106 177,161 -3,832 -2.12 6,523 10.26 0.0195
2019-11-12 2019-09-30 13F POLYONE COM 73179P106 180,993 4,028 2.28 5,916 6.38 0.0151
2019-08-14 2019-06-30 13F POLYONE COM 73179P106 176,965 18,359 11.58 5,561 19.39 0.0182
2019-05-15 2019-03-31 13F POLYONE COM 73179P106 158,606 10,644 7.19 4,658 -27.88 0.0156
2019-02-13 2018-12-31 13F POLYONE COM 73179P106 147,962 376 0.25 6,459 0.08 0.0230
2018-11-08 2018-09-30 13F POLYONE COM 73179P106 147,586 -3,786 -2.50 6,454 -1.36 0.0234
2018-08-03 2018-06-30 13F POLYONE COM 73179P106 151,372 -11,257 -6.92 6,543 -5.38 0.0222
2018-05-11 2018-03-31 13F POLYONE COM 73179P106 162,629 -13,950 -7.90 6,915 -9.97 0.0265
2018-02-08 2017-12-31 13F POLYONE COM 73179P106 176,579 -14,377 -7.53 7,681 0.50 0.0267
2017-11-06 2017-09-30 13F POLYONE COM 73179P106 190,956 17,707 10.22 7,643 13.87 0.0272
2017-07-31 2017-06-30 13F POLYONE COM 73179P106 173,249 50,533 41.18 6,712 60.42 0.0268
2017-05-05 2017-03-31 13F POLYONE COM 73179P106 122,716 9,525 8.41 4,184 15.39 0.0183
2017-02-02 2016-12-31 13F POLYONE COM 73179P106 113,191 22,396 24.67 3,626 18.11 0.0176
2016-11-04 2016-09-30 13F POLYONE COM 73179P106 90,795 -5,833 -6.04 3,070 -9.86 0.0156
2016-08-11 2016-06-30 13F POLYONE COM 73179P106 96,628 3,328 3.57 3,406 20.69 0.0204
2016-05-10 2016-03-31 13F/A-1 POLYONE COM 73179P106 93,300 -210,865 -69.33 2,822 -70.79 0.0176
2016-02-03 2015-12-31 13F POLYONE COM 73179P106 304,165 81,698 36.72 9,660 47.98 0.0589
2015-11-02 2015-09-30 13F/A-1 POLYONE COM 73179P106 222,467 26,514 13.53 6,528 -14.94 0.0599
2015-10-30 2015-09-30 13F DIREXION SHS ETF TR COM 73179P106 222,467 6,528
2015-08-07 2015-06-30 13F/A-1 POLYONE COM 73179P106 195,953 134,684 219.82 7,675 235.45 0.0694
2015-08-04 2015-06-30 13F POLYONE COM 73179P106 195,953 134,684 7,675 0.0694
2015-05-14 2015-03-31 13F/A-1 POLYONE COM 73179P106 61,269 9,935 19.35 2,288 17.57 0.0199
2015-05-01 2015-03-31 13F POLYONE COM 73179P106 61,269 2,288
2015-02-10 2014-12-31 13F POLYONE COM 73179P106 51,334 51,334 1,946 0.0172
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.